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SUMMARY:Free-breathing 3D whole-heart coronary MR angiography: motion-reso
 lved and nonrigid motion-corrected reconstruction methods - Teresa Matias 
 Correia\, King's College London\, Biomedical Engineering Department
DTSTART:20181005T150000Z
DTEND:20181005T160000Z
UID:TALK112120@talks.cam.ac.uk
CONTACT:Yury Korolev
DESCRIPTION:Slow acquisitions and susceptibility to respiratory motion art
 ifacts are major challenges in free-breathing 3D whole-heart coronary MR a
 ngiography (CMRA). Respiratory-resolved reconstruction approaches have bee
 n proposed to achieve 100% scan efficiency using mainly non-Cartesian acqu
 isitions and exploiting sparsity in the respiratory dimension. However\, i
 rregular respirations compromise its suitability for Cartesian imaging. In
  this talk\, I will describe a robust framework for Cartesian imaging\, wh
 ich provides high-quality respiratory-resolved images by incorporating mot
 ion information from image navigators (iNAV) to increase the sparsity in t
 he respiratory dimension and to compensate for 2D translational motion wit
 hin each respiratory phase. In addition\, in this talk I will present anot
 her approach that provides a nonrigid motion-corrected CMRA image at a giv
 en respiratory phase\, with improved coronary vessel sharpness. 
LOCATION:MR 14\, Centre for Mathematical Sciences
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